BIO 180-15 s04 - XVIII. Cardiac physiology XVIII. Cardiac...

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XVIII. Cardiac physiology
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XVIII. Cardiac physiology - Deals with heartbeat
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XVIII. Cardiac physiology - Deals with heartbeat - Must beat synchronously
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XVIII. Cardiac physiology - Deals with heartbeat - Must beat synchronously - “ rhythmically
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XVIII. Cardiac physiology - Deals with heartbeat - Must beat synchronously - “ rhythmically A. Cardiac muscle cells
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XVIII. Cardiac physiology - Deals with heartbeat - Must beat synchronously - “ rhythmically A. Cardiac muscle cells - Contains steps of skeletal muscle
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XVIII. Cardiac physiology - Deals with heartbeat - Must beat synchronously - “ rhythmically A. Cardiac muscle cells - Contains steps of skeletal muscle - Difference is in A.P.
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A. Cardiac muscle cells - Contains steps of skeletal muscle - Difference is in A.P. - Much longer than skeletal
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A. Cardiac muscle cells - Contains steps of skeletal muscle - Difference is in A.P. - Much longer than skeletal - Contains plateau phase (Ca ++ channels)
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A. Cardiac muscle cells - Contains steps of skeletal muscle - Difference is in A.P. - Much longer than skeletal - Contains plateau phase (Ca ++ channels) 1. Cardiac A.P.
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1. Cardiac A.P. 4 Stages:
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1. Cardiac A.P. 4 Stages: Depolarization
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1. Cardiac A.P. 4 Stages: Depolarization - Na + Channels open
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1. Cardiac A.P. 4 Stages: Depolarization - Na + Channels open - K + Channels closed
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1. Cardiac A.P. 4 Stages: Depolarization - Na + Channels open - K + Channels closed - Some Ca ++ open
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1. Cardiac A.P. 4 Stages: Depolarization - Na + Channels open - K + Channels closed - Some Ca ++ open Early repolarization & plateau
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1. Cardiac A.P. 4 Stages: Depolarization - Na + Channels open - K + Channels closed - Some Ca ++ open Early repolarization & plateau - Na + close
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- Some Ca ++ open Early repolarization & plateau - Na + close - Some K + open
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- Some Ca ++ open Early repolarization & plateau - Na + close - Some K + open - Ca ++ open
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- Some Ca ++ open Early repolarization & plateau - Na + close - Some K + open - Ca ++ open Repolarization
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- Some Ca ++ open Early repolarization & plateau - Na + close - Some K + open - Ca ++ open Repolarization - Ca ++ close
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- Some Ca ++ open Early repolarization & plateau - Na + close - Some K + open - Ca ++ open Repolarization - Ca ++ close - K + open
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- Ca ++ open Repolarization - Ca ++ close - K + open 2. Autorhythmicity
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- Ca ++ open Repolarization - Ca ++ close - K + open 2. Autorhythmicity - SA node stimulates itself to contract rhythmically
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BIO 180-15 s04 - XVIII. Cardiac physiology XVIII. Cardiac...

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